Net greenhouse energy balance
A greenhouse layer in a insulated cup practical absorbs \(720\,\text{W m}^{-2}\) and emits \(625\,\text{W m}^{-2}\). Calculate the net gain. Enter the numerical result and choose the interpretation that matches the physics meaning.
Worked practice: physics data and result
Read the physical quantities first, then calculate the result and state what it means.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.